An annuity-immediate pays 20 per year for 10 years, then payments decrease by 1 each year for 19 years. At an annual effective interest rate of 6%, the present value is equal to X. Calculate X.

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Q: iii) modulus of complex z = cos20 %3D ÷-(cos0)² + i equal to | a. V3 b.3 c. V2 d. 2 а. С.

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